51 lines
1.1 KiB
LLVM
51 lines
1.1 KiB
LLVM
; Test that the strspn library call simplifier works correctly.
|
|
;
|
|
; RUN: opt < %s -passes=instcombine -S | FileCheck %s
|
|
|
|
@abcba = constant [6 x i8] c"abcba\00"
|
|
@abc = constant [4 x i8] c"abc\00"
|
|
@null = constant [1 x i8] zeroinitializer
|
|
|
|
declare i64 @strspn(ptr, ptr)
|
|
|
|
; Check strspn(s, "") -> 0.
|
|
|
|
define i64 @test_simplify1(ptr %str) {
|
|
; CHECK-LABEL: @test_simplify1(
|
|
|
|
%ret = call i64 @strspn(ptr %str, ptr @null)
|
|
ret i64 %ret
|
|
; CHECK-NEXT: ret i64 0
|
|
}
|
|
|
|
; Check strspn("", s) -> 0.
|
|
|
|
define i64 @test_simplify2(ptr %pat) {
|
|
; CHECK-LABEL: @test_simplify2(
|
|
|
|
%ret = call i64 @strspn(ptr @null, ptr %pat)
|
|
ret i64 %ret
|
|
; CHECK-NEXT: ret i64 0
|
|
}
|
|
|
|
; Check strspn(s1, s2), where s1 and s2 are constants.
|
|
|
|
define i64 @test_simplify3() {
|
|
; CHECK-LABEL: @test_simplify3(
|
|
|
|
%ret = call i64 @strspn(ptr @abcba, ptr @abc)
|
|
ret i64 %ret
|
|
; CHECK-NEXT: ret i64 5
|
|
}
|
|
|
|
; Check cases that shouldn't be simplified.
|
|
|
|
define i64 @test_no_simplify1(ptr %str, ptr %pat) {
|
|
; CHECK-LABEL: @test_no_simplify1(
|
|
|
|
%ret = call i64 @strspn(ptr %str, ptr %pat)
|
|
; CHECK-NEXT: %ret = call i64 @strspn(ptr %str, ptr %pat)
|
|
ret i64 %ret
|
|
; CHECK-NEXT: ret i64 %ret
|
|
}
|